UTFGrid

UTFGrid parameters:
Center:     {"x": 121.72 ,"y": 31.23 }
Scale:     0.00000720332
View bounds:

•     Left bottom: {"x": 121.68 , "y":31.19 }
•     Right top : { "x": 121.77 , "y":31.27}

•   Width: 256
•   Height: 256
•   PixcelCellCount: 8